// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview WebGL utility functions
 */
o3v.webGLUtil = {
  /**
   * Tests whether the browser supports WebGL.
   * @param {Element} canvasEl A canvas element in the current document.
   * @return {boolean} True iff browser supports WebGL.
   */
  browserSupportsWebGL: function (canvasEl) {
    try {
      if (!canvasEl) {
        return false;
      }
      if (!window.WebGLRenderingContext) {
        return false;
      }
      var gl = canvasEl.getContext('webgl');
      if (!gl) {
        gl = canvasEl.getContext('experimental-webgl');
      }
      if (!gl) {
        return false;
      }
      return true;
    } catch (err) {
      return false;
    }
  }
};
